String#<=> doesn't handle non-string arguments, but in MRI it does
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Key: JRUBY-1722
URL: http://jira.codehaus.org/browse/JRUBY-1722
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Environment: JRuby 1.1b1, latest trunk, Ubuntu 7.10
Reporter: Vladimir Sizikov
Attachments: string_compare_nonstring.diff
Consider the following example:
{noformat}
obj = Object.new
def obj.to_str() "" end
def obj.<=>(arg) 1 end
puts ("abc" <=> obj)
puts ("xyz" <=> obj)
{noformat}
MRI 1.8.6, MRI 1.9, Rubinius, all prints
-1
-1
JRuby prints:
nil
nil
This causes one rubinius spec failure:
String#<=> compares its argument and self by calling <=> on obj and turning the
result around if obj responds to to_str FAILED
Expected nil to equal -1
/opt/work/rubinius/spec/mini_rspec.rb:221:in `=='
/opt/work/rubinius/./spec/core/string/comparison_spec.rb:68:in `=='
/opt/work/rubinius/./spec/core/string/comparison_spec.rb:63:in `it'
/opt/work/rubinius/spec/mini_rspec.rb:414:in `it'
/opt/work/rubinius/./spec/core/string/comparison_spec.rb:63:in `it'
/opt/work/rubinius/./spec/core/string/comparison_spec.rb:63:in `describe'
/opt/work/rubinius/spec/mini_rspec.rb:410:in `describe'
/opt/work/rubinius/./spec/core/string/comparison_spec.rb:49:in `describe'
/opt/work/rubinius/./spec/core/string/comparison_spec.rb:49:in `load'
tmp/last_mspec.rb:13:in `load'
tmp/last_mspec.rb:1:in `each'
tmp/last_mspec.rb:7:in `each'
The proposed patch fixes the problem and the spec failure.
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